package com.atguigu.gulimall.order.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * @Author: WackyBoy
 * @Date: 2021/7/14 21:06
 */
@Configuration
public class GuliFeignConfig {

    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor() {

        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                // 1. RequestContextHolder拿到刚进来的这个请求
                ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                if(attributes != null) {
                    HttpServletRequest request = attributes.getRequest();
                    // 2. 同步请求头信息, Cookie
                    if(request != null) {
                        String cookie = request.getHeader("Cookie");
                        // 给新请求同步了老请求的Cookie
                        template.header("Cookie", cookie);
                    }
                }
            }
        };

    }

}
